function shallowEquals(obj1,obj2){
    if(obj1 === obj2){
     return true;
    }
    if(typeof obj1 !== 'object' || obj1 === null||typeof obj2 !== 'object' || obj2 === null ){
     return false;
    }
    let keys1 = Object.keys(obj1);
    let keys2 = Object.keys(obj2);
    if(keys1.length!=keys2.length){
     return false;
    }
    for(let key of keys1){
        if(!obj2.hasOwnProperty(key)||obj1[key]!== obj2[key]){
         return false;
        }
    }
    return true;
 }
let a = {};
let b = {};
console.log(shallowEquals(a,b));